How to Divide in Your Head Quickly

Math teacher Charlie Kasov discusses how to divide in your head. Take these tips and tricks and you too will speed up your division.

Synonym Classroom provides clear and concise answers to common questions in Education, Math, Science, among other topics relevant to today's student and teacher.

[casachezdoom]

`How to Divide by 5 in Your Head Quickly"
There, I fixed the title.

[danahkim]

I do something like this. If it's like 800 divided by 25, then I know that 25 goes inside 100 four times. And 100 goes inside 800 eight times.
Then multiply 4 and 8 to get 32, which is how many times 25 would go into 800.

[deep_nag]

It's only by 5 ...please sir give us the process of easy dividing other no.

[AhmadH]

LOL I WAS DOING THIS TRICK T O MY TEACHER SHE WAS FREAKED OUT SHE WAS LIKE SINCE WHEN DID YOU BECOME A CALCULATOR??

[johntan]

Yeah but what if I want to divide 1549 by 2890 quickly what do you do?

[NicoleAndrea-whcl]

what if the number isnt divisible by 2 or 10???

[DjZephy]

i figured this out on my own when i was like 8... what I want to know is how to divide 1 by 24 in my head to figure out what percentage it would be without having to use a calculator

[Vexilologist]

Thank you this technique helped my son a lot

[lakelaos]

Thanks I was bad but your trick works😀😀

[khasoumi]

Wth..it s for 5 only? I was excited and thought my nephew then it turn out doesnt work on 7-9 tsk

[shubhsharma]

Its fab I want more such tricks from where do I found more

[trooper]

How do I dived 1.8 into a number in my head

[grantno]

were did the x2 come from I don't get it ?

[angelrivas]

Now I have the look up a video on how to multiply by 2 in ur head 😅

[vogilisettyakhilkumar]

Yes it works.. but only for 5 I think..

[lucygao]

have a math test tommorow trying to study

[wallywales]

how are you that good at righting backwards

[Berryxcherrys]

So the answer must be the lower number in the bigger number in the question

[bellamolano]

I'm in year 3 and I usually get good grades but my grades are falling for some reason

[islamferhat]

Ok, but what if I want to divide 4, 678, 976 by 123, 547, 819.See.How do you do that mentally.